Leap year starting on Wednesday

Leap year starting on Wednesday
A leap year starting on Wednesday is any year with 366 days (i.e. it includes 29 February) that begins on Wednesday 1 January and ends on Thursday 31 December. Its dominical letters hence are ED. The most recent year of such kind was 2020 and the next one will be 2048 in the Gregorian calendar, or likewise, 2004 and 2032 in the obsolete Julian calendar, see below for more.
Any leap year that starts on Monday, Wednesday or Thursday has two Friday the 13ths: those two in this leap year occur in March and November. Common years starting on Thursday share this characteristic, but also have another in February.
This is the only leap year with three occurrences of Friday the 17th: those three in this leap year occur three months (13 weeks) apart: in January, April, and July. Common years starting on Sunday share this characteristic, in the months of February, March, and November.
From August of the common year preceding that year until October in this type of year is also the longest period (14 months) that occurs without a Tuesday the 13th. Common years starting on Saturday share this characteristic, from July of the year that precedes it to September in that type of year.
Calendars
Applicable years
Gregorian Calendar
Leap years that begin on Wednesday, along with those starting on Tuesday, occur at a rate of approximately 14.43% (14 out of 97) of all total leap years in a 400-year cycle of the Gregorian calendar. Thus, their overall occurrence is 3.5% (14 out of 400).
For this kind of year, the corresponding ISO year has 53 weeks.
Julian Calendar
Like all leap year types, the one starting with 1 January on a Wednesday occurs exactly once in a 28-year cycle in the Julian calendar, i.e. in 3.57% of years. As the Julian calendar repeats after 28 years that means it will also repeat after 700 years, i.e. 25 cycles. The year's position in the cycle is given by the formula ((year + 8) mod 28) + 1).
Holidays
International
Valentine's Day falls on a Friday
The leap day (February 29) falls on a Saturday
World Day for Grandparents and the Elderly falls on July 26
Halloween falls on a Saturday
Christmas Day falls on a Friday
Roman Catholic Solemnities
Epiphany falls on a Monday
Candlemas falls on a Saturday
Saint Joseph's Day falls on a Thursday
The Annunciation of Jesus falls on a Wednesday
The Nativity of John the Baptist falls on a Wednesday
The Solemnity of Saints Peter and Paul falls on a Monday
The Transfiguration of Jesus falls on a Thursday
The Assumption of Mary falls on a Saturday
The Exaltation of the Holy Cross falls on a Monday
All Saints' Day falls on a Sunday
All Souls' Day falls on a Monday
The Feast of Christ the King falls on November 22 (or on its earliest possible date of October 25 in versions of the calendar between 1925 and 1962)
The First Sunday of Advent falls on November 29
The Immaculate Conception falls on a Tuesday
Gaudete Sunday falls on December 13
Rorate Sunday falls on December 20
Australia and New Zealand
Australia Day falls on a Sunday
Waitangi Day falls on a Thursday
Daylight saving ends on April 5
ANZAC Day falls on a Saturday
Mother's Day falls on May 10
Father's Day falls on September 6
Daylight saving begins on September 27 in New Zealand and October 4 in Australia
British Isles
Saint David's Day falls on a Sunday
Mother's Day falls on its earliest possible date of March 1, or on March 8, March 15, March 22 or March 29
Saint Patrick's Day falls on a Tuesday
Daylight saving begins on March 29
Saint George's Day falls on a Thursday
Father's Day falls on its latest possible date, June 21
Orangeman's Day falls on a Sunday
Daylight saving ends on its earliest possible date, October 25
Guy Fawkes Night falls on a Thursday
Saint Andrew's Day falls on a Monday
Canada
Daylight saving begins on its earliest possible date, March 8
Mother's Day falls on May 10
Victoria Day falls on its earliest possible date, May 18
Father's Day falls on its latest possible date, June 21. This is the only leap year when Victoria Day and Labour Day are 34 days apart. They are 27 days apart in all other leap years.
Canada Day falls on a Wednesday
Labour Day falls on its latest possible date, September 7 – this is the only leap year when Victoria Day and Labour Day are sixteen weeks apart (they are fifteen weeks apart in all other leap years)
Thanksgiving Day falls on October 12
Daylight saving ends on its earliest possible date, November 1 -This is the only leap year when Labour Day and the end of Daylight Saving Time are 55 days apart. They are 62 days apart in all other leap years
United States
Martin Luther King Jr. Day falls on January 20
President's Day falls on February 17
Daylight saving begins on its earliest possible date, March 8
Mother's Day falls on May 10
Memorial Day falls on its earliest possible date, May 25
Juneteenth falls on a Friday
Father's Day falls on its latest possible date, June 21. This is the only leap year when Memorial Day and Father’s Day are 27 days apart. They are 20 days apart in all other leap years. This is also the only leap year when the start of Daylight Saving Time and Father’s Day are 15 weeks apart. They are 14 weeks apart in all other leap years
Independence Day falls on a Saturday
Labor Day falls on its latest possible date, September 7 – this is the only leap year when Memorial Day and Labor Day are fifteen weeks apart (they are fourteen weeks apart in all other leap years). This is the only leap year when the start of Daylight Saving Time and Labor Day are 183 days apart. They are 176 days apart in all other leap years.
Grandparents' Day falls on its latest possible date, September 13. This is the only leap year when Memorial Day and Grandparent’s Day are 111 days apart. They are 104 days apart in all other leap years. This is also the only leap year when the start of Daylight Saving Time and Grandparent’s Day are 27 weeks apart. They are 26 weeks apart in all other leap years
Columbus Day falls on October 12
Daylight saving ends on its earliest possible date, November 1. This is the only leap year when Labor Day and the end of Daylight Saving Time are 55 days apart. They are 62 days apart in all other leap years. This is also the only leap year when Father’s Day and the end of Daylight Saving Time are 19 weeks apart. They are 20 weeks apart in all other leap years. This is also the only leap year when Grandparent’s Day and the end of Daylight Saving Time are 7 weeks apart. They are 8 weeks apart in all other leap years
Election Day falls on November 3
Thanksgiving Day falls on November 26
References
Gregorian calendar
Wednesday